scholarly journals Intense non-neutral beam propagation in a periodic solenoidal field using a macroscopic fluid model with zero thermal emittance

1997 ◽  
Vol 4 (10) ◽  
pp. 3710-3717 ◽  
Author(s):  
Ronald C. Davidson ◽  
Peter Stoltz ◽  
Chiping Chen
Keyword(s):  
Fluid Model ◽  
Beam Propagation ◽  
Neutral Beam ◽  
Thermal Emittance ◽  
Solenoidal Field

scholarly journals Fast ignitor: Fluid dynamics of channel formation and laser beam propagation

1997 ◽  
Vol 15 (4) ◽  
pp. 541-556 ◽  
Author(s):  
S. Hain ◽  
P. Mulser
Keyword(s):  
Electromagnetic Wave ◽  
Radiation Pressure ◽  
Fluid Model ◽  
Fluid Dynamic ◽  
Beam Propagation ◽  
Dense Matter ◽  
Nonlinear Propagation ◽  
Channel Formation ◽  
Fast Ignitor ◽  
Ablation Pressure

The concept of fast ignitor is intimately connected with the fundamental phenomenon of ultra-intense light beam propagation through dense matter in which kinetic effects combine with radiation pressure dominated hydrodynamics to form a complex scenario of extremely non-linear physics. In this paper, the fluid dynamic aspect of channel formation in a highly over-dense plasma is studied and possible attenuation mechanisms of the propagating pulse are evaluated in one dimension. Under the assumption that mass ablation reaches a quasistationary state, the radiation-assisted ablation pressure, the speed of the bow shock, and the density steepening around the critical point are determined self-consistently from the ID fluid conservation relations and the electromagnetic wave equation. Due to ponderomotive profile steepening, the ablation pressure is reduced by 40% in the subsonic region and is dominated by the radiation pressure in the supersonic domain. Channel lengths are calculated for various intensities and pellet compression ratios. Likewise, the nonlinear propagation of a superintense electromagnetic wave in an underdense plasma channel is investigated for the ID case with the help of a relativistic fluid model.

Model of Neutral-Beam Propagation in a Duct With Scrapers

2008 ◽  
Vol 36 (4) ◽  
pp. 1545-1551 ◽  
Author(s):  
T.D. Akhmetov ◽  
V.I. Davydenko ◽  
A.A. Ivanov
Keyword(s):  
Beam Propagation ◽  
Neutral Beam
Sign in / Sign up

Export Citation Format

Share Document